Block structure for retaining wall system



FIG. 1 is a perspective view of the block structure for retaining wall system;

FIG. 2 is a right side view thereof, which is a mirror image of the left side view thereof;

FIG. 3 is a top view thereof, which is a mirror image of the bottom view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a back view thereof. 

The ornamental design for a block structure for retaining wall system, as shown and described. 